Road machine



July 8 1924. 1,500,392 J. B. JARMIN 7 ROAD MACHINE Filed April 10 1922 Gram Patented July 8,v 1924.

UNITED STATES 1' 1,500,392 PATENT oFFlc JAMES B. JARMIN, OF SPOKANE, WASHINGTON.

norm MACHINE.

Application filed AprillO, 1922. lserial'no'. 551,217. e

To all whom it may concern:

Be it known that I, JAMES B. JARMIN, a citizen of the United States,residing at Spokane, in Spokane County and State of Washington, have invented certain new and useful Improvements in Road Machines, of which the following is a specification.

My present invention relates to improvements in road machines of the wheeled scraper type for leveling,-grading, and packing the roadway or surface of a macadam', gravel, or other similar'road. The primary object of the invention is the provision, in combination with a scraper for leveling the surface of the road, of a complementary member for smoothing and packingthe material at the surface of the road.- Thus I employv a forward scraper followed by a rear flat, smoothing or packing blade, both carried by the machine, and disposed in parallelism. The scraping and smoothing members are supported from a flexible auxiliary frame, through pivotal connections, and the flexible frame is swiveled to the main frame of the implement whereby the scraper and smoothing-blade may be adjusted angularly in relation to the direction of travel of the implement. ment of parts the scraper bladeis adapted to scrape the rough surfaces of the road bed and the smoothing blade adapted to compact the loosened material, and both elements are designed to spread the material laterally of the roadway. The main frame of the implement is tiltable in order that the scraping and smoothing blades may be angularly adjusted transversely of the road bed. The broad features of the combinations and arrangements of parts are set forth in a copending application for Patent Ser. No. 551,316, dated April 10, 1922, and the. specific combination and arrangement of the smoothing blade is set forth in the specification and claims herewith.

In the accompanying drawings:

Figure 1 is a view in side elevation of an implement embodying my invention.

Figure 2 is a top plan view of a portion of the implement showing the relation of the scraper blade and the smoothing blade transversely of the implement.

Figure 3 is a detail view, enlarged show ing the pivotal connection of a scraper blade with its flexible frame.

Figure 41 is a detail view showing the piv- By this adj ust-,

otal connection of a smoothing blade with its flexible-frame.

Figure 5 is a detail plan View showing a portion of the scraper frame and its relation to the main frame.

The main frame 1 is preferably rectangular in'shape converging at the front where it is supported on the steering wheels 2, and by means ofthehead 3, king pin'a, screw bar 5 and coupling nut 6 the forward end of the main frame may be elevated or depressed. At the rear the main frame is providedwith a pair of complementary crank axles 7 for the rear wheels 8 and bymeans of a pair of operating levers 9 and connections, either or both of the crank axles may be turned to elevate or depress the main frame with relation to the supporting wheels.

By elevating one side of'the frame, the latter is tilted', and this tilted condition ofthe frame is utilized in the angular adjustment of the scraper bar 10 and smoothing bar 11..

The two drag members 10 and 11 are supported from a flexible scraper frame that .is swiveled to the main frame at the'rear there'- of and is capable of swinging on this swivel.

joint to the right or left of the longitudinal center line of the implement. are two side bars 12 of the scraperframe, which at their rear ends are pivotally con- Thus there nected with a transverse bolster 12 that is swiveled in bearings in a yoke 18'depending from, and fixed beneath the rear cross bar 14 of the. main frame, the swivel point being indicated at 15 in dotted lines in Figure 2. At their forward ends these side bars have bearing plates 16 for vertical posts 17 and in which the osts are rotatable that are attached at thelr upper ends to a rotary ring 18. The ring is supported to rotate in guide brackets 19 on the main frame, and means are provided for locking the ring in adjusted position with relation to the main frame. Thus, when the main frame is tilted to one side to impose its weight on complementary ends of the blade 10 and blade 11, the dragging movement of these ends over the surface of the road will result in flexing the scraper frame and turning the bars 10 and 11 to angular position with relation to the direction of travel of the implement. The ring 18 is revolved swinging the front end of the flexible frame to right or left, while the rear end of the frame through its swiveled bolster turns on a pivot point.

To pro ide for this a gular adjus m nt of the scraper blade, it is pivoted by means of a clevis 20 to each of the side bars 12 as best seen in Figure 3 where both a vertically disposed pin and a horizontally disposed pin in the clevis permit lateral and vertical movement of the concavo-convex blade 10. But to hold the blade in rigid, adjusted position and prevent it from turning down, I use a notched bracketarm 21 fixed to the side bar 12 that engages over-the top edge of thesera-per, that does not prevent lateral swinging of the scraper ib'lade when required.

The smoothing or drag blade '11 lies in a position angular to the horizontal, and is pivoted at 22 to a pair of links 23, whie'h turn are pivoted to t he respective side bars 12 of the flexible frame, as at 24. The links are made up of twisted metal plates or straps so that the pivots 22 permit the blade to swing in a horizontal plane, and the pivots 24tpermit the blade to swing in a vertical plane. The vertical movement of the smoothing or drag bar is indicated in dotted lines in Figure 4, and is accomplished through the medium of a vertically disposed screw bar 2'5, supported in a hearing frame 26 above the main frame of the implement, and provided with a turn or hand wheel 27. At its lower end the screw bar is loosely con nected as by an eye 28 and U bolt 29 at the longitudinal center of the smoothing loar. The length of the Usholt is sufficient to permit the necessary transverse movement of the scraper Ebar and-smoothing bar when the flexible frame is swung on its swivel joint. By turning the-hand wheel 27, as the driver sits in the seat 30, the smoothing lea-r may be swung on its pivots -24, :to elevate or depress the bar and adjust its hearing or pres sure ,on the surface of the roadbed. In this manner it will be apparent that the parts are so arranged in order to scrape off the elevations or projections; in the road, and the smoothing bar which follows the scraper bar, will ride over these loosely distributed gliavels ,or piecestof stone, and smooth the road surface by packing the loose material. If "the smoothing blade is not required, it may be elevated to inoperative position by turning the hand wheel 27 to lift the smoothifng blade from contact with the road surace.

Having thus fully described my invention, what'I claim and desire to secure by Letters Patent is 1. The combination in a wheeled implement with its main frame, of a flexible sub stantially Ushaped frame having a central swiveled connection W-iththe main frame at one end and pivotal connections with said frame at the other end, a smoothing bar pivotally supported in the flexible frame, and means for adjusting the pressure of said smoothing bar on the roadway surface.

2. The combination in a wheeled scraper with a tilta-ble main frame, of a flexible sub stantial ly Ll-shaped frame having a central swiveled connection at one end to the main frame and pivotal connections with said frame at its other end, a pivoted scraper bar carried by said flexible frame, a pivoted smoothing bar carried by the flexible frame, and means for adjusting the pressure of said smoothing loar on the roadway surface.

Thetornbination with a flexible supporting frame, of a smoothing bar, links pivoted on said frame to swing in a vertical pl-ane,. and pivotal connections between said links and bar to permit pivotal movement of the bar in a horizontal plane, a screw bar suitably supported, and a flexible connection between said screw bar and said smoothing bar for the purpose described.

In testimony whereof I afix my signature.

B. JAR'MiN. 

